1. doc.: IEEE 802.11-06/655r0 Submission May 2006 Slide 1Scott Lee, et al., Samsung Electronics Use Cases of WLAN for AV Streams Scott Seongwook Lee, Huai-Rong Shao, Chilyoul Yang, Harkirat Singh and Chiu Ngo Samsung Electronics May 16, 2006

2. doc.: IEEE 802.11-06/655r0 Submission May 2006 Scott Lee, et al., Samsung ElectronicsSlide 2 Overview Application devices Configuration parameters Application examples Key requisites

3. doc.: IEEE 802.11-06/655r0 Submission May 2006 Scott Lee, et al., Samsung ElectronicsSlide 3 Personal mobile devices –Mobility –Ad-hoc organization –Relative low bandwidth traffic –A little QoS requirement Home PC Projector Game console Home theater (AV receiver) MP3 player Digital camera Camcorder DVD/BD player STB (Cable TV access) DTV Wireless AP (Internet gateway) PMP Laptop PC Application Devices Home appliances –No mobility –Infrastructural organization –Relatively high bandwidth traffic –Stringent QoS constraints

4. doc.: IEEE 802.11-06/655r0 Submission May 2006 Scott Lee, et al., Samsung ElectronicsSlide 4 Configuration Parameters Topology Infrastructure Cable set-top Network coordination with conventional AV set-top box IP set-top IP gateway-centric network management environment Ad hoc Point-to-point One-to-one direct communication (single hop) End-to-end Delivering data over multiple intermediate nodes (multi-hop) Ex) Relaying data through participating wireless nodes Service type Unicast 1-to-1 communication Ex) Simple AV streaming or data communication btw. devices Broadcast / Multicast 1-to-many communication Ex) Servicing the same AV to multiple devices simultaneously Data type Best-effort Legacy packets of data networks Ex) Control signals btw. CE devices Multimedia Compressed Encoded AV streams with time latency of codec Ex) AV streaming btw. STB and TV Uncompressed Raw AV data without codec Ex) Streaming btw. game console and TV Thinkable WLAN applications fall into the combinations of the above categories. Among many different possible use cases from the combinations, some notable cases are illustrated in the following slides.

5. doc.: IEEE 802.11-06/655r0 Submission May 2006 Scott Lee, et al., Samsung ElectronicsSlide 5 Home PC STB (Cable TV access) DTV Wireless AP (Internet gateway) Digital camera Camcorder PMP Cable set-top or IP set-top / Unicast / Compressed DVD/BD player Projector Point-to-point / Unicast / Compressed Application Examples (1) Typical home environment use cases –Usually infrastructure mode –Partially ad hoc connections (i.e., direct links) –Tx device transmits AV streams to a dedicated Rx device.

6. doc.: IEEE 802.11-06/655r0 Submission May 2006 Scott Lee, et al., Samsung ElectronicsSlide 6 Application Examples (2) Home theater (AV receiver) STB (Cable TV access) Wireless AP (Internet gateway) DVD/BD player Cable set-top or IP set-top / Broadcast or Multicast / Compressed or Uncompressed DTV Projector Home environment with multiple Rx devices –Rx devices receiving the same AV streams –Time synchronization issues –Same QoS level to multiple Rx devices

7. doc.: IEEE 802.11-06/655r0 Submission May 2006 Scott Lee, et al., Samsung ElectronicsSlide 7 DTV Point-to-point / Unicast / Uncompressed Projector Game console Application Examples (3) Wireless gaming environment –Small latency requirement Delays of codec are one of bottlenecks. Strong FEC mechanism is expected. –One of the most challenging cases

8. doc.: IEEE 802.11-06/655r0 Submission May 2006 Scott Lee, et al., Samsung ElectronicsSlide 8 PMP Laptop PCHotspot / Jukebox Point-to-point / Broadcast or Multicast / Compressed Application Examples (4) Multimedia jukebox in public places –Hotspots or jukeboxes broadcast/multicast AV streams QoS over broadcast/multicast channels Film industry-approved security level Pricing the public AV streams –Personal Rx devices Laptop Personal multimedia player (PMP)

9. doc.: IEEE 802.11-06/655r0 Submission May 2006 Scott Lee, et al., Samsung ElectronicsSlide 9 PMP Laptop PCHotspot / Jukebox Point-to-point / Unicast / Compressed Cable set-top or IP set-top / Unicast / Best-effort DTV Projector Application Examples (5) Multimedia rental services –Rental houses No physical media (CDs or DVDs) required Film industry-approved security –Users Download AV files via secured channel Watch movies through PMP while moving Watch movies through DTV at home

10. doc.: IEEE 802.11-06/655r0 Submission May 2006 Scott Lee, et al., Samsung ElectronicsSlide 10 PMP Laptop PC DTV Projector STB (Cable TV access) Wireless AP (Internet gateway) DVD/BD player Home theater (AV receiver) Laptop PCHome PC Cable set-top or IP set-top / Unicast or Broadcast or Multicast / Compressed or Uncompressed Cable set-top or IP set-top / Unicast / Best-effort Application Examples (6) Contents sharing with home storage devices –Sources Domestic distributed environment Contents library –Renderers Contents browsing Display panels (TV, web pad, etc.) PCs (desktop, laptop, etc.) –Both

11. doc.: IEEE 802.11-06/655r0 Submission May 2006 Scott Lee, et al., Samsung ElectronicsSlide 11 Key Requisites QoS (throughput, delay, jitter) Reliability (strong FEC for low-latency applications) Broadcast/Multicast Coverage/Range Portability/Mobility Content protection and security Support different kinds of media formats Source of media content (stored vs. live/interactive )

12. doc.: IEEE 802.11-06/655r0 Submission May 2006 Scott Lee, et al., Samsung ElectronicsSlide 12 Thank you!